(E)- β-Farnesene is one of aphid alarm pheromones with potential worth for scientific research and practical application. Based on the property to drive aphid away, (E)- β- Farnesene could keep aphid out of greenhouse or agricultural sheds. If (E)- β- Farnesene is used with some general insecticides together, aphid could be killed directly and on its own initiative, which is good for environment protection, foodstuff safety, etc. Most of the raw pesticides must be formulated for the use in agriculture. Sele...